Sound-box.



1. HOFFAY.

. SOUND B ox.

- l APPLICA-HUN HLED MAR. 13| 1914. l

Lg@ Patented June 15, 1915.

2 SHEETS-SHEET l.

J. HOFFAY.

SOUND Box.

' APPLICATION FILED MAR. I3, i914. 1,143,394., mme@ Jun@ 15 1915.

2 SHEETS-SHEET 2.

.rosa Horner, or LONDON, ENGLAND.

SOUND-BOX.

Application filed March 13, 1914.

. To all whom 'it may concern:

Be it known that l, Jose Herma', a citizen of the'Republic of Mexico,and a resident of London, England, have invented certain new and usefulImprovements in Sound-Boxes; and l do hereby declare the following to bea full, clear, and exact description of the same.

This inventionrelates to improvements in sound boxes or the like forgramophones, phonographs and the like machines having the stylus levermade of a forked formation, the bifurcations straddling the diaphragm,which formation is not per se new.

The invention has for an' object to obtain a vibratory action of thediaphragm which is free from the defects arising from the action ofdistortion' of the stylus lever arising from the working of the stylusin the sound groove.

To this end, the invention consists in com- `bining a forked styluslever with a diaphragm in such manner that the bifurcations connected tothe diaphragm are under stress and tend either to separate from orapproach toward each other s0 as respectively to put under continuoustension or compression relatively rigid means passing through thediaphragm and connecting the bifurcations to the diaphragm and to oneanother, thereby balancing by relatively rigid connection the diaphragmbetween the resilient bifurcations in thestylus lever, and

.obtaining a braced' or more rigid structure.

Embodiments` of -the invention are illustrated, by way of example, inthe accompanying drawings, in which Figure 1 shows an elevation of oneform of 4stylus lever in aso'un'd boxshown partly in transverse section;Fig. 2 is a -face view partly in section; Fig. 3 shows anelevation ofamoditied form of stylus lever ina sound box shown in transversesection; Fig. 4 is an elevation of another modification.

The stylus lever comprises two bifurca# tions, 1, 2, which straddle thediaphragm, 3, one on the outer side, and the otheron the inner side andpassing through an open-l ing, 4, in'theusual tubular extension, 5, ofthe sound box, 6, without Contact therewith. The bifurcations onopposite sides are connected to the diaphragm and to one another understress by means passing through the diaphragm.

The bifurcations may be kept under stress by means such as a bolt andnuts, 7, 8, (Flg.

Specification of Letters Patent.

Patented J une 15, 1915.

i seria1N0.s24,44a.

l), pulling or tying them toward one another to the relative positionsshown in full lines, from what would be their natural un- .restrained4relative positions shown in dotted lines. Or, the bifurcations may bekept under stress by means such asa bolt and nuts, 9, 10, (Fig. 3)splaying 'or strut-ting 'them apart from what would be their naturalrelative positions shown in dotted lines. The bifurcations may beinsulated from the diaphragm, by making the connectorof 'a suitableinsulating substance, or ini-other are mounted in 'sound boxes which areduplicates of that represented in Fig. 3, and may be connected to atrumpet or trumpets in any convenient manner. The sound boxes arearranged facing one another. and may be spaced apart, by a yoke oryokes, 15, made fast to two car1'ier rings,.13. The

forked stylus lever is pivoted on the yoke at 16, and the bifurcations,which are under stress, extend, on the 'inner sides of the diaphragms,through the tubular extensions, 5,

- and are connected to the diaphravms and to one another by a'connector, l?, passing through both diaphragms.

What I claim as my invention and desire to secure by Letters Patentis 1. 1n a sound box or the like for a gramophone, phonograph, or thelike machine, in combination, a diaphragm, a pivotally mounted forkedstylus lever straddling the :diaphragm and having its bifurcations understress and tending to change their distance from each other, andrelatively rigid means kept under continuous stress by the bifurcationsand connecting the bifurcw tions to the diaphragm and to each other.

2. In a sound box or the like for a gramophone, phonograph, or the likemachine, in combination, a diaphragm, a pivotally mounted forked styluslever straddling the diaphragm andl having its bifurcations under stressand tending to separate from each other, and relatively rigid means keptun-' der continuous tension by the bifurcations and connecting thebifurcations to the diaphragm'and to each other.

'3. In a sound box-or `the like for a gramophone, phonograph, or thelike machine, in

combination, a diaphragm, a pivotally `of the bifurcations to thediaphragmv and to eachother without contactingA said ends with thediaphragm.

ll. In a sound box or the like for a gramophone, phonograph, or the likemachine, in combination, a diaphragm, a pivotally mounted forked styluslever straddling the.

diaphragm and having its bifurcations under st ress and tending tochange their distance from each other, and relatively rigid means keptunder continuous stress by the bifurcations and passing through theVdiaphragm and connecting the bifurcations to the diaphragm and to eachother.

5. In a sound boX or the like for a gram0- phone, phonograph, or thelike machine, in combination, `a diaphragm, a pivotally mounted forkedstylus'lever straddling the diaphragm and having'its vbifurcations under stress and tending to change their distance from each other, andrelatively rigid means comprising a bolt and nuts on the bolt bearingthe bifurcations, said means being kept un- -der continuous stress bythe bifurcations 'and connecting the bifurcations to the diaphragm andto each other.

v 6. Sound reproducing or recording means comprising, in combination, aplurality of sound boxes, a plurality of diaphragms mounted therein, apivotally mounted forked stylus lever straddling the diaphragms andhaving its bifurcations4 under stress and tending to change theirdistance from each other, and relatively rigid means kept un-v dercontinuous stress by the bifurcations and connecting the bifurcations tothe diaphragms and to each other.

7 Sound reproducing or recording means against the diaphragm and fcomprising, in combination, a plurality of Y straddling the diaphragmeand having its bifurcations p under stress and tending to changetheirdistance from each other, and relatively rigid means kept undercontinuous stress by the bifurcations and connecting the bifurcations tothe diaphragrns and to each other.

8. ln a sound boX or the like for a gramophone, phonograph, orthe likemachine, in combination, a diaphragm, a pivotally mounted forked styluslever straddling the diaphragm and having its bifurcations un-A derstress and tending to change their dis tance from each other, andrelatively rigid means kept under continuous stress by the bifurcationsand connecting the bifurcations to the diaphragm and to each other, oneof said bifurcations passing through part of the sound boX.

9. Sound reproducing or recording means comprising, vin combination, aplurality ofv mounted forked stylus lever straddling the diaphragmsnndhavingA its bifurcations under stress and tending to change theirdisltance from each other, and relatively rigid means kept undercontinuous stress and conn nectingthe free ends of the bifurcations tothe diaphragme and to each other Without contacting said ends With thediaphragms.

10. Sound reproducing or means comprising, in combination, a pluralityof soundbpxes spaced apart, a plurality of 'diaphragms mounted therein,a pivotally mounted forked stylus lever strad dling the diaphragms andhaving the bifurcations under stress and tending to separate from eachother, and relatively rigid means kept under continuous stress andconnecting the bifurcations to the diaphragme and to each other.

In testimony whereof aiiiX my signature in presence of two subscribingWitnesses.

` JOSE HOFFAY.

Witnesses.: l

ALFRED DAY, WALTER DAY.

opiel of this patent maybe obtained for ve cents each, by addressing'the Commissioner of Patents,

Washingtondhc.

recording Y

